Centrifugal ventilator



2 Sheets Sheet 1.

A. P; BLAKE.

' Centrifugal Ventilator. j

No. 46,067. Patented Jany 31, 18 65.

Wi'z naas 6 M PETERS. Pholfl-Lilhographlr. Walhingtan, B. C

2 Sheets-Sheet 2. A. P. BLAKE.

Centrifugal Venti|ator.- No. 46,067. Patented Jany 31, 1865.

UNITED STATES PATENT OFFICE.

I ALPHEUS I. BLAKE, OF MILTON, MASSACHUSETTS.

CENTRIFUGAL VENTILATOR.

Specification forming part of Letters Patent No. 46,067, dated January31, 1865.

To aZZ whom it may concern:

Be it known that I, ALPHEUS P. BLAKE, of Milton, in the county ofNorfolk, State of Massachusetts, have invented a new and ImprovedCentrifugal Ventilator; and I do hereby declare that the following is afull and exact description thereof, reference being had to theaccompanying drawings, and to the letters of reference marked thereon.

The nature of my invention consists in the combination of a verticalwindmill or propelling-head with an improved centrifugal exhaust wheelor ventilator.

To enable others skilled in the art to make and use my invention, I willproceed to describe it.

Drawing No. 1, elevation; No. 2, vertical section through exhaust-wheel;N0. 3, horizontal section of exhaust-wheel; No. 4, horizontal section ofpropelling head or windmill.

A B O D in No.1 is a vertical windmill. The form of the buckets or fansare shown in section on No. 4. E G eg in Nos. 1 and 2, and in section Gg G gH h H h in No. 3 are fans or blowers of exhaust-wheel. These fans,as shown, do not extend from the circumference to the center, but arecut off at a certain dis tance from the central shaft, for the purposeof securing additional efficiency for exhaustion when in motion, and forallowing a free passage of air when the wheel is at a rest.

E c Ffin No. 2 is an upper head or disk of exhaust-wheel, extending, asshown, beyond the circumference of the wind-wheel. This extension of theupper and lower disks with the fans beyond the wind-wheel gives agreatly increased power to the ventilator.

Grg H h in Nos. 1 and 2 and G H HG in No. 8 is the lower disk ofexhaustwheel, provided with a large orifice, as shown at g h h g in No.3. The circumference of the orifice limits the extension of the fanstoward the center, as shown at No. 3. i

i I J in No.2 is a shaft, supported at the lower end by the foot-pan Kand at the upper end by any suitable arch or frame, the lower ends ofwhich are attached to the chimney, ventilating-flue, or building, asshown on No. 1.

L M in Nos. 1 and 2 is a circular and slightlyconical top piece ofchimney or flue; 0 g h P in No.2, a tube attached to and extending downfrom the circumference of the orifice in the lower disk into the toppiece, L M. The object of this last combination is to prevent thepassage of air into the vacuum in the exhaust-wheel from any sourceother than the proper one through the chimney or air-tlue.

The office and action of my invention is this: It is placed over anychimney, air-flue, or opening from which it is desirable to draw air,smoke, or gas. Any breeze acting upon the windmill will cause it toturn. The exhaustfans will revolve rapidly, and, throwing off the airfrom the extremities, will cause a vacuum to form in the center, whichmust be supplied from the chimney, airflue, or opening over which theinstrument is placed.

\Nhat I claim as my invention, and desire to secure by Letters Patent,is

l. The arrangement of the fans or blowers of the exhaust-wheel.

2. Incasing the fans or blowers at the top and bottom.

3. The combination and arrangement of the fans, disk, and wheel, asshown in section in N o. 2, all of which substantially as described andfor the purpose set forth.

A. P. BLAKE.

Witnesses:

J. HERBERT SHEDD, WILLIAM EDsoN.

